When sourcing silk dress shirts, the primary indicator of quality is the Momme weight (mm). For professional dress shirts, a weight of 19mm to 22mm is ideal, as it provides the perfect balance of durability and drape. You should also verify the silk type; Grade 6A Mulberry Silk is the industry gold standard, characterized by long fibers and a pearlescent sheen. Always request a burn test report or a fiber composition analysis to ensure the fabric is 100% pure silk and not a polyester satin blend.